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12 February 1996 <br /> AGE-NC Project No.95-0106 <br /> Page 5 of 6 <br /> laboratory to be analyzed for intrinsic permeability, moisture content and porosity in <br /> accordance with the appropriate ASTM methods. <br /> 11. Cuttings will be stored with soil already stockpiled on-site. Disposal alternatives will be <br /> evaluated based on results of laboratory analyses. <br /> 12. Rinseate generated during drilling activities will be containerized in properly labeled D.O.T. <br /> model 17H 55-gallon drums, and stored on-site in an area inaccessible to the general public. <br /> Convert the borings as four-inch diameter monitoring wells in accordance with the well design <br /> in Figure 3. <br /> 13. Develop new monitoring wells utilizing a submersible pump until water is essentially sediment <br /> free. <br /> 14. Survey the top of each well casing to the nearest 1/100th of an inch to determine the elevation <br /> relative to a single well. <br /> 4.2. GROUND WATER SAMPLING <br /> 1. No sooner than 48 hours after installation of ground water monitoring wells, measure to the <br /> nearest 0.01 foot, the static water level in the new wells. <br /> 2. Using a dedicated bailer or submersible pump, surge and purge all wells. At least three well <br /> volumes of water will be removed from each well to stabilize temperature, pH, and <br /> conductivity; stabilization parameters will be measured at one-well volume intervals. Ground <br /> water samples will be collected using polyethylene disposable bailers; samples will be <br /> collected in 1-liter amber bottles 40-m1 VOA vials preserved with hydrochloric acid. <br /> 3. Label and log water samples on a chain-of-custody form. <br /> 4. Store the samples in a chilled container and transport under chain-of-custody procedure to <br /> a state-certified laboratory for analysis. Water samples will be analyzed for TPH-g, BTE&X <br /> and MTBE, in accordance with EPA methods 5030/8015m, 8020/602 and 8020/602, <br /> respectively. <br /> 5. Store purged water in properly labeled D.O.T. model 17H 55-gallon drums on-site in an area <br /> inaccessible to the general public, pending analytical results. <br /> 4.3. EXCAVATION BACKFILLING <br /> For backfilling of the excavation, the following procedures will be followed: <br /> 1. Remove any standing water within the former UST excavation and drum the water on site. <br />